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Subject[PATCH v2 1/5] x86/mm: Recompute physical address for every page of per-CPU CEA mapping
Recompute the physical address for each per-CPU page in the CPU entry
area, a recent commit inadvertantly modified cea_map_percpu_pages() such
that every PTE is mapped to the physical address of the first page.

Fixes: 9fd429c28073 ("x86/kasan: Map shadow for percpu pages on demand")
Cc: Andrey Ryabinin <>
Signed-off-by: Sean Christopherson <>
arch/x86/mm/cpu_entry_area.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/mm/cpu_entry_area.c b/arch/x86/mm/cpu_entry_area.c
index dff9001e5e12..d831aae94b41 100644
--- a/arch/x86/mm/cpu_entry_area.c
+++ b/arch/x86/mm/cpu_entry_area.c
@@ -97,7 +97,7 @@ cea_map_percpu_pages(void *cea_vaddr, void *ptr, int pages, pgprot_t prot)

for ( ; pages; pages--, cea_vaddr+= PAGE_SIZE, ptr += PAGE_SIZE)
- cea_set_pte(cea_vaddr, pa, prot);
+ cea_set_pte(cea_vaddr, per_cpu_ptr_to_phys(ptr), prot);

static void __init percpu_setup_debug_store(unsigned int cpu)
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